21035632866 has 32 divisors (see below), whose sum is σ = 43297272960. Its totient is φ = 6808323456.

The previous prime is 21035632847. The next prime is 21035632867. The reversal of 21035632866 is 66823653012.

It is not an unprimeable number, because it can be changed into a prime (21035632867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10830 + ... + 205398.

It is an arithmetic number, because the mean of its divisors is an integer number (1353039780).

Almost surely, 2^21035632866 is an apocalyptic number.

21035632866 is an abundant number, since it is smaller than the sum of its proper divisors (22261640094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21035632866 is a wasteful number, since it uses less digits than its factorization.

21035632866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195098.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 21035632866 in words is "twenty-one billion, thirty-five million, six hundred thirty-two thousand, eight hundred sixty-six".